384242847 has 4 divisors (see below), whose sum is σ = 512323800. Its totient is φ = 256161896.

The previous prime is 384242819. The next prime is 384242849. The reversal of 384242847 is 748242483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 748242483 = 3 ⋅249414161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-384242847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 384242799 and 384242808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384242849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64040472 + ... + 64040477.

It is an arithmetic number, because the mean of its divisors is an integer number (128080950).

Almost surely, 2^384242847 is an apocalyptic number.

384242847 is a deficient number, since it is larger than the sum of its proper divisors (128080953).

384242847 is a wasteful number, since it uses less digits than its factorization.

384242847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128080952.

The product of its digits is 344064, while the sum is 42.

The square root of 384242847 is about 19602.1133299448. The cubic root of 384242847 is about 727.0014278596.

The spelling of 384242847 in words is "three hundred eighty-four million, two hundred forty-two thousand, eight hundred forty-seven".